var winWidth = 0;
var winHeight = 0;
var ratioWidth = 0;
var ratioHeight = 0;
function currentWindSize() //函数：获取当前窗口尺寸
{
//获取窗口宽度
if (window.innerWidth)
winWidth = window.innerWidth;
else if ((document.body) && (document.body.clientWidth))
winWidth = document.body.clientWidth;
//获取窗口高度
if (window.innerHeight)
winHeight = window.innerHeight;
else if ((document.body) && (document.body.clientHeight))
winHeight = document.body.clientHeight;
//通过深入Document内部对body进行检测，获取窗口大小
if (document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth) {
winHeight = document.documentElement.clientHeight;
winWidth = document.documentElement.clientWidth;
}
}
function resize() {
currentWindSize();
setIframeHeight(winHeight);
}
//获取当前窗口大小
currentWindSize();

window.onresize = resize;
setIframeHeight(winHeight);